SARAL
SARAL ( Satellite with ARGOS and ALtiKa ) is an Earth observation satellite of the Indian ISRO and the French space agency, CNES.
He was born on February 25, 2013 at 12:31 UTC with a PSLV launcher along with the Canadian NEOSSat and Sapphire, the Austrian TUGSAT 1 and UniBRITE, the British beach 1 and the Danish AAUSAT started from the launch pad No. 1 of the Indian Satish Dhawan Space Centre brought to the island of Sriharikota in a sun-synchronous orbit.
Structure and Mission
The three -axis stabilized satellite is equipped working with a Ka-band ( 35.75 GHz) radio altimeter ( Altika ), a system for precise orbit determination (DORIS ), a laser reflector array (LRA ) and a transponder system ( Argos -3). Altika to provide accurate data on the topography of the surface of the oceans, and thus continue the work carried out by the radio altimeter RA-2 onboard Envisat measurements. The data obtained should be processed by the French ground segment SALP (Système d' altimetry et de Localisation Précise ), which was already used for the evaluation of the data, the altimeter of Envisat, GFO, Jason 1 and 2 and TOPEX / Poseidon. Argos -3 may also serve to monitor the oceans, by which forwards the data from buoys on the sea surface, such as wind speed and wave height of the transponder. The observation payload was developed by the CNES with support from Thales Alenia Space and met on 11 July 2012 at Bangalore, India, one of the ISRO Satellite Centre ISAC. The contract for the construction of the satellite was closed in February 2007. The power supply is provided by two each 1.4 m long and 1.2 m wide solar boom the 570 W supply, are being required for the satellite bus about 204 W and for the observation payload about 195 W. Energy storage is provided by a lithium -ion battery pack apparatus with a capacity of 21 Ah. For telemetry is an S-band Koomunikationssystem available. SARAL was built based on the IMS -2 satellite bus of ISRO and has a design life of 5 years, with Altika is only designed for a service life of three years.
The 82 kg heavy NEOSSat (Near Earth Object Surveillance Satellite Space ) is equipped with the first of the Canadian Space Agency ( CSA, Canadian Space Agency) designed Space Telescope and to the observation of near-Earth objects and space debris serve. The about 148 kg, of MacDonald, Dettwiler and Associates ( MDA) built Sapphire serves the same purpose and monitored objects at altitudes 6000-40000 kilometers by means of an optical sensor system. The both 14 kg TUGSAT 1 ( Graz University of Technology ) and UniBRITE (University of Vienna ) should, within the framework of the BRITE international project (Bright Target Explorer) with the participation of institutions in Austria, Canada and Poland brightness fluctuations and temperatures of stars up to a magnitude capture of 4. The Technology Experiment Satellite beach 1 is equipped with smartphone technology and a plasma thruster. The 3 kg heavy AAUSAT of Aalborg Universitetscenters turn to oversee the international shipping as part of the Automatic Identification System (AIS).